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Plant Science Today (PST)

Research Articles

Vol. 13 No. 3 (2026)

Soil seed bank and vegetation dynamics along an altitudinal gradient in Grewia optiva Drumm. ex Burret patches of the Western Himalaya

DOI
https://doi.org/10.14719/pst.12416
Submitted
25 October 2025
Published
14-09-2026 — Updated on 30-09-2026
Versions

Abstract

Grewia optiva Drumm. ex Burret, a multipurpose tree species of the Western Himalaya, plays a significant role in agroforestry systems and rural livelihoods. The present study investigates the phytosociological attributes and soil seed bank dynamics across 5 altitudinal gradients  (500-1000 m asl) along National Highway 07 in Uttarakhand. Vegetation analysis was carried out using quadrat sampling and key community parameters such as density, frequency, abundance, Importance value index (IVI) and diversity indices (Shannon-Wiener, Simpson and species richness) were computed. Soil seed bank composition was assessed through seedling emergence under controlled conditions. Results revealed marked altitudinal variation in species composition and community structure. Lower altitudes (500-600 m) were of high dominance of Bidens pilosa, Andropogon spp. and Ocimum basilicum, with lower diversity (H′ = 2.05) but the highest seed bank density. In contrast, higher altitudes (900-1000 m) exhibited greater species diversity (H′ = 2.70), richness and evenness, with species such as Holcus lanatus and Ageratina adenophora contributing significantly, although seed bank density was comparatively low. Mid-altitudes (600-800 m) showed intermediate patterns in both vegetation and seed bank attributes. ANOVA test reveals a significant difference in diversity index and seed bank potential across altitudinal gradients. A contrasting trend was observed between above-ground diversity and soil seed bank density, with a negative correlation between seedling abundance and diversity (r = - 0.72) and a positive association with species dominance (r = 0.73). These findings suggest that lower altitudes act as seed reservoirs dominated by opportunistic species, while higher altitudes support more stable and diverse plant communities. The study highlights the complementary roles of standing vegetation and soil seed banks in maintaining ecosystem dynamics and provides insights for biodiversity conservation and sustainable management of Himalayan Agroforestry systems.

 

References

  1. 1. Singh C. Grewia optiva, Hybrid Napier Based Silvipastoral System for Degraded Lands in North West Himalayas. Dehradun: Central Soil and Water Conservation Research and Training Institute; 2011.
  2. 2. Tariyal N, Bijalwan A, Chaudhary S, Singh B, Dhanai CS, Tewari S, et al. Crop production and carbon sequestration potential of Grewia oppositifolia-based traditional agroforestry systems in Indian Himalayan region. Land. 2022;11(6):839. https://doi.org/10.3390/land11060839
  3. 3. Shah D, Chauhan S, Negi AK. Effects of slope aspect on tree and shrub diversity of Lesser Himalaya of Garhwal Region, Uttarakhand, India. Int J Ecol Environ Sci. 2024;50(3):467–79. https://doi.org/10.55863/ijees.2024.0066
  4. 4. Mueller-Dombois D, Ellenberg H. Aims and Methods of Vegetation Ecology. New York: John Wiley & Sons; 1974.
  5. 5. Concenço G, Tomazi M, Correia IVT, Santos SA, Galon L. Phytosociological surveys: tools for weed science. Planta Daninha. 2013;31(2):469–82. https://doi.org/10.1590/S0100-83582013000200025
  6. 6. Roberts HA. Seed banks in the soil. In: Advances in Applied Biology. Vol. 6. Cambridge: Academic Press; 1981. p. 1–110.
  7. 7. Zobel M, Kalamees R, Püssa K, Roosaluste E, Moora M. Soil seed bank and vegetation in mixed coniferous forest stands with different disturbance regimes. For Ecol Manage. 2007;250(1-2):3–9. https://doi.org/10.1016/j.foreco.2007.03.011
  8. 8. Thompson K. The functional ecology of seed banks. In: Fenner M, editor. Seeds: The Ecology of Regeneration in Plant Communities. 2nd ed. Wallingford (UK): CAB International; 2000. p. 31–58. https://doi.org/10.1079/9780851994321.0215
  9. 9. Bakker MR, Udo N, Atlan A. Explaining the larger seed bank of an invasive shrub in non-native versus native environments by differences in seed predation and plant size. Ann Bot. 2019;123(5):917–27. https://doi.org/10.1093/aob/mcy229
  10. 10. Wang Y, Jiang D, Toshio O, Zhou Q. Recent advances in soil seed bank research. Contemp Probl Ecol. 2013;6(5):520–24. https://doi.org/10.1134/S199542551305014X
  11. 11. Martins CC, Silva WR da. Estudos de bancos de sementes do solo. Informativo Abrates. 1994;4(1):49–56.
  12. 12. Curtis JT, McIntosh RP. The inter-relations of certain analytic and synthetic phytosociological characters. Ecology. 1950;31(3):434–55. https://doi.org/10.2307/1931497
  13. 13. Mishra R. Ecology Work Book. New Delhi: Oxford and IBH Publishing; 1968.
  14. 14. Margalef R. Information theory in ecology. Gen Syst Bull. 1957;3(1):36–71.
  15. 15. Shannon CE, Weaver W. The Mathematical Theory of Communication. Urbana: University of Illinois Press; 1963.
  16. 16. Philips EA. Methods of Vegetation Study. New York: Henry Holt & Co. Inc.; 1959.
  17. 17. Benoit DL, Kenkel NC, Cavers PB. Factors influencing the precision of soil seed bank estimates. Can J Bot. 1989;67(10):3033–40. https://doi.org/10.1139/b89-364
  18. 18. Mickelson JA, Stougaard RN. Assessment of soil sampling methods to estimate wild oat (Avena fatua) seed bank populations. Weed Sci. 2003;51(2):226–30. https://doi.org/10.1614/0043-1745(2003)051[0226:AOSSMT]2.0.CO;2
  19. 19. Curtis JT, Cottam G. Plant Ecology Work Book: Laboratory Field Reference Manual. Minnesota: Burgess Publication Co.; 1956.
  20. 20. Sharma CM, Baduni NP, Gairola S, Ghildiyal SK, Suyal S. Tree diversity and carbon stocks of some major forest types of Garhwal Himalaya, India. For Ecol Manage. 2010;260(12):2170–79. https://doi.org/10.1016/j.foreco.2010.09.014
  21. 21. Singh JS, Singh SP. Forests of Himalaya: Structure, Functioning and Impact of Man. Nainital: Gyanodaya Prakashan; 1992.
  22. 22. Rawat YS, Pangtey YPS. Phytosociology of alpine vegetation around Tungnath in Garhwal Himalaya. Proc Indian Natl Sci Acad B. 1987;53(4):341–52.
  23. 23. Körner C. The use of ‘altitude’ in ecological research. Trends Ecol Evol. 2007;22(11):569–74. https://doi.org/10.1016/j.tree.2007.09.006
  24. 24. Singh SP, Bassignana-Khadka I, Karky BS, Sharma E. Climate Change in the Hindu Kush Himalayas: The State of Current Knowledge. Kathmandu: ICIMOD; 2015.
  25. 25. Baskin CC, Baskin JM. Seeds: Ecology, Biogeography and Evolution of Dormancy and Germination. 2nd ed. San Diego: Academic Press; 2014.
  26. 26. Fenner M, Thompson K. The Ecology of Seeds. Cambridge: Cambridge University Press; 2005. https://doi.org/10.1017/CBO9780511614194
  27. 27. Saatkamp A, Cochrane A, Commander L, Guja LK, Jimenez-Alfaro B, Larson J, et al. A research agenda for seed trait functional ecology. New Phytol. 2014;203(3):697–708. https://doi.org/10.1111/nph.12801
  28. 28. Vázquez-Yanes C, Orozco-Segovia A. Patterns of seed longevity and germination in the tropical rainforest. Annu Rev Ecol Syst. 1993;24:69–87. https://doi.org/10.1146/annurev.es.24.110193.000441
  29. 29. Khan ML, Shankar U. Effect of seed weight, light regime and substratum microsite on germination and seedling growth of Quercus semecarpifolia Sm., a Himalayan tree species. Ann Bot. 2001;87(5):775–83. https://doi.org/10.1006/anbo.2001.1409

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